We may earn a commission if you buy through links on this page. It never changes a score or a ranking. How we make money
Most buyers should pick Brex.
Pick Mercury if you want a free business banking core: its no-fee plan has no minimum balances and includes free ACH, domestic wires and real-time payments. Pick Brex if you need cards, expenses, travel, bill pay and accounting in one platform; Essentials is free, while Premium is $12 per user monthly. Mercury Plus costs $23.95 monthly with annual billing ($29.90 month-to-month). Mercury uses partner banks, so weigh the support risk before making it your only bank.
01Side by side
| Mercury | Brex | |
|---|---|---|
| Starting price | Free core plan; Plus $23.95/month annually. | Free Essentials; Premium starts at $12/user/month. |
| Free plan | No monthly fees or minimum balances. | Essentials includes one local card program. |
| Best for | Businesses needing core banking and payments. | Startups to enterprises needing a finance platform. |
| Core strength | Banking, payments, cards and cash management. | Cards, expenses, travel, bill pay and accounting. |
| Learning curve | Not published on the vendor's site. | Not published on the vendor's site. |
| Integrations/data | QuickBooks, Xero, NetSuite sync; AI automations. | Accounting integrations; customizable ERP/HRIS on Premium. |
| Team/seat costs | Plus $23.95 annually billed; per-seat price not published. | Premium costs $12 per user monthly. |
| Support | Review score: 4/10; priority support on Plus. | Review score: 6/10; account manager on Enterprise. |
Mercury Choose Mercury if
- Choose Mercury if you want no-fee banking with no minimum balances.
- Choose Mercury if free ACH, domestic wires, and real-time payments matter.
- Choose Mercury if QuickBooks, Xero, or NetSuite sync fits your stack.
Brex Choose Brex if
- Choose Brex if cards, expenses, travel, bills, and accounting need one platform.
- Choose Brex if you need multi-entity support on Premium.
- Choose Brex if $12 per user monthly suits your budget.
02Pricing compared
Mercury’s free plan has no monthly fee or minimum balance and includes free ACH, domestic wires, and real-time payments. Mercury Plus is $23.95 per month with annual billing or $29.90 month-to-month; Pro is $239.90 or $299, respectively. Plus includes a 30-day trial, but the pricing page does not list a Brex trial. Brex Essentials is free and priced per user; Premium is $12 per user per month, with annual pricing not published. Essentials includes one local card program and up to two entities, while Premium adds broader expense policies and multi-entity support. The plans aren’t directly comparable: Mercury’s listed paid prices are monthly plan prices, while Brex Premium scales by user count. Mercury Books and Payroll are separate add-ons, with fees waived through Dec. 31, 2026.
03Features and depth
Mercury centers on business banking and financial management. Its free plan includes core payment services, while the product also offers checking and savings, virtual cards with spend controls, reimbursements and approvals, bill pay, invoicing, accounting integrations, and cash-management options. The pricing page lists up to $5 million in FDIC insurance; banking services are provided through partner banks, not Mercury itself.
Brex is broader as a combined finance platform: corporate cards, expense management, travel booking, bill pay, banking, and accounting automation. Its free Essentials plan includes accounting integrations, free travel booking, one local card program, and up to two entities (one global). Premium adds multiple customizable expense policies, dynamic review chains, multi-entity support, and customizable ERP and HRIS integrations. Brex also lists AI-assisted accounting and automated expense workflows. If banking and payments are the priority, Mercury’s free core is compelling; if consolidating cards, expenses, travel, and bills matters more, Brex covers more of that workflow in one platform.
04Ease of use and learning curve
The available review scores rate Mercury’s ease of use at 7/10 and Brex at 7.5/10; those scores don’t establish how either product will fit a particular team. The published details describe different kinds of complexity: Mercury’s paid plans add finance workflows, while Brex’s Premium price is per user and its tools cover expenses, travel, cards, and accounting.
For a small team that mainly needs banking and payments, Mercury’s free plan has fewer listed product areas to evaluate. Brex may reduce tool-switching for teams that want the wider finance suite, but setup and learning-curve details aren’t published in the published information. Compare your current workflows and Brex’s per-user cost before deciding.
Questions people ask
Which is cheaper, Mercury or Brex?
Both offer a free entry plan. Mercury’s free plan includes core banking and payments; Brex Essentials is also free and includes features such as accounting integrations and travel booking. Brex Premium costs $12 per user monthly, while Mercury Plus costs $23.95 monthly with annual billing or $29.90 month-to-month.
Does Mercury provide banking directly?
No. Mercury is a fintech platform, and its banking services are provided through partner banks. Its free plan lists no monthly fees or minimum balances, plus free ACH, domestic wires, and real-time payments. We’d weigh the partner-bank model and the review’s support concerns before making it your only bank.
Does Brex have a free plan?
Yes. Brex Essentials is listed at $0 per user per month. It includes one local card program, up to two entities (one global), accounting integrations, and free travel booking. Brex Premium costs $12 per user monthly; annual billing rates are not published.
Which should a startup choose?
Choose Mercury if a free business banking core, payment services, and account controls are the priority. Choose Brex if you want cards, expense management, travel, bill pay, and accounting in one finance platform. Both offer a free plan, so compare the included workflows and Brex’s per-user Premium price against your needs.